linux-kernel - Re: [PATCH v2 0/7] Rework random blocking

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Message-ID: <CALCETrWeWQeotMXbY2yKOmWbhW7HZLYdFBUVcFy3vCmSnm+9Sw@mail.gmail.com>
Date:   Fri, 20 Sep 2019 07:46:19 -0700
From:   Andy Lutomirski <luto@...nel.org>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     Theodore Tso <tytso@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux API <linux-api@...r.kernel.org>,
        Kees Cook <keescook@...omium.org>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        "Ahmed S. Darwish" <darwish.07@...il.com>,
        Lennart Poettering <mzxreary@...inter.de>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        "Alexander E. Patrakov" <patrakov@...il.com>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Willy Tarreau <w@....eu>,
        Matthew Garrett <mjg59@...f.ucam.org>,
        Ext4 Developers List <linux-ext4@...r.kernel.org>,
        linux-man <linux-man@...r.kernel.org>
Subject: Re: [PATCH v2 0/7] Rework random blocking

On Fri, Sep 20, 2019 at 7:36 AM Andy Lutomirski <luto@...nel.org> wrote:
>
> This makes two major semantic changes to Linux's random APIs:

Hmm.  I have at least two issues in here that need fixing:

 - getrandom() can warn.  Whoops.

 - Repeatedly calling getentropy in GRND_INSECURE mode will interfere
will CRNG init.

v3 will fix these issues.